Your search found 144 records
1 Weragala, Neelanga; Smakhtin, Vladimir. 2004. Simulating hydrological alterations in the conditions of limited data: lessons from the Walawe River Basin in Sri Lanka. In Herath, S.; Pathirana, A.; Weerakoon, S. B. (Eds.). Proceedings of the International Conference on Sustainable Water Resources Management in the Changing Environment of the Monsoon Region. Bandaranaika Memorial International Conference Hall, Colombo, Sri Lanka, 17-19 November 2004. Vol.1. Colombo, Sri Lanka: National Water Resources Secretariat. pp.251-259.
River basins ; Stream flow ; Hydrology ; Simulation models ; Soil water ; Evaporation ; Assessment ; Surface runoff ; Land use ; Percolation / Sri Lanka / Walawe River Basin / Thimbolketiya Catchment / Rakwana Oya
(Location: IWMI-HQ Call no: IWMI 574.526323 G744 WER, 333.91 G000 HER Record No: H035896)
2 Smakhtin, Vladimir; Revenga, C.; Döll, P. 2004. A pilot global assessment of environmental water requirements and scarcity. Water International, 29(3):307-317.
Water requirements ; Water demand ; Ecosystems ; Ecology ; Environmental effects ; Hydrology ; Water use ; Models ; Water scarcity
(Location: IWMI HQ Call no: PER Record No: H035968)
3 Smakhtin, Vladimir; Shilpakar, R. L. 2005. Planning for environmental water allocations: an example of hydrology-based assessment in the east Rapti River, Nepal. Colombo, Sri Lanka: International Water Management Institute (IWMI). v, 20p. (IWMI Research Report 089) [doi: https://doi.org/10.3910/2009.090]
Water allocation ; Planning ; Hydrology ; Simulation models ; Rivers ; Flow ; Environmental effects / Nepal / East Rapti River
(Location: IWMI-HQ Call no: IWMI 551.48 G726 SMA Record No: H036382)
(440KB)
Although the protection of the aquatic environment is high on the world water resources agenda, most developing countries still lack the technical and institutional capacity to establish environmental water allocation practices and policies. The existing methods of assessment of environmental water allocations are either complex and resource-intensive or not tailor-made for the specific conditions of a particular country or region. To promote emerging concepts of environmental flow assessment and management, it is important to change the dominant perception that environmental demand is the least important and create awareness among responsible authorities about existing methodologies and processes that should be followed. This report presents some of these approaches and illustrates their applicability in the specific context of the East Rapti River basin, which features one of the main tourist attractions of Nepal, the Chitwan National Park.
4 Amarasinghe, Upali A.; Sharma, Bharat R.; Aloysius, Noel; Scott, Christopher; Smakhtin, Vladimir; de Fraiture, Charlotte. 2004. Spatial variation in water supply and demand across river basins of India. Colombo, Sri Lanka: International Water Management Institute (IWMI). v, 37p. (IWMI Research Report 083) [doi: https://doi.org/10.3910/2009.084]
Water supply ; Water demand ; River basins ; Catchment areas ; Water availability ; Water scarcity ; Estimation ; Irrigation water ; Domestic water ; Population growth ; Urbanization ; Groundwater extraction ; Crop production ; Policy ; Water transfer / India
(Location: IWMI-HQ Call no: IWMI 333.91 G635 AMA Record No: H036620)
(2.09MB)
India is a large country with regional differences in per-capita water supply and demand. Attempts to describe the water situation in India at a national level are often misleading due to the tremendous diversity in the water situation across the country. This Report analyzes the spatial variation of water supply and demand across river basins in India. The study identifies basins that are water-scarce because of inadequate water availability to meet the effective demand. It also identifies issues that are important for estimating the future water demand and for the formation of policy for future water-resources development and management.
5 Smakhtin, Vladimir; Batchelor, A. L. 2005. Evaluating wetland flow regulating functions using discharge time-series. Hydrological Processes, 19:1293-1305.
(Location: IWMI-HQ Call no: IWMI 333.91 G000 SMA Record No: H028980)
(1.07 MB)
This paper describes a parsimonious approach for the evaluation of wetland hydrological functions, based on continuous observed streamflow records and flow duration curves. The functions evaluated are baseflow maintenance and flood attenuation, jointly referred to as flow regulation. The first step in this evaluation is to establish a reference hydrological condition. This condition is defined in terms of mean daily and instantaneous daily maximum flow time-series and their corresponding duration curves, assuming that there is no wetland in the catchment. Further steps include calculating the changes of various flow percentiles, caused by the presence of a wetland, detailed hydrograph analysis, baseflow analysis and analysis of changes in characteristics of continuous flow events above and below specified threshold discharges. The method is illustrated using the observed streamflow data in the catchment of the Rustenburg wetland in South Africa.
6 Smakhtin, Vladimir; Weragala, Neelanga. 2005. An assessment of hydrology and environmental flows in the Walawe River Basin, Sri Lanka. Colombo, Sri Lanka: International Water Management Institute (IWMI) v, 13p. (IWMI Working Paper 103) [doi: https://doi.org/10.3910/2009.278]
River basins ; Hydrology ; Stream flow ; Environmental effects ; Reservoirs ; Precipitation / Sri Lanka / Walawe River Basin
(Location: IWMI-HQ Call no: IWMI 551.483 G744 SMA Record No: H038045)
(736 KB)
7 Illaszewicz, J.; Tharme, Rebecca; Smakhtin, Vladimir; Dore, J. (Eds.) 2005. Environmental flows: rapid environmental flow assessment for the Huong River Basin, Central Vietnam. Hanoi, Vietnam: International Union for Conservation of Nature (IUCN). ix, 81p.
River basins ; Water resource management ; Environmental effects ; Hydrology ; Stream flow ; Vegetation / Vietnam / Huong River Basin
(Location: IWMI-HQ Call no: IWMI 551.483 G784 ILL Record No: H037947)
http://cmsdata.iucn.org/downloads/song_huong_tieng_anh.pdf
https://vlibrary.iwmi.org/pdf/H037947.pdf
https://vlibrary.iwmi.org/pdf/H037947.pdf
(6.54 MB) (6.5MB)
8 Illaszewicz, J.; Tharme, Rebecca; Smakhtin, Vladimir; Dore, J. (Eds.) 2005. Dong chay moi truong: Danh gia nhanh Dong chay moi truong cho luru vuc song Huong, mien Trung Viet Nam. In Vietnamese. [Environmental flows: rapid environmental flow assessment for the Huong River Basin, Central Vietnam]. Hanoi, Vietnam: International Union for Conservation of Nature (IUCN). ix, 81p.
River basins ; Water resource management ; Environmental effects ; Hydrology ; Stream flow ; Vegetation / Vietnam / Huong River Basin
(Location: IWMI-HQ Call no: IWMI 551.483 G784 ILL Record No: H037948)
http://cmsdata.iucn.org/downloads/song_huong_tieng_anh.pdf
https://vlibrary.iwmi.org/pdf/H037948.pdf
https://vlibrary.iwmi.org/pdf/H037948.pdf
(6.54 MB) (6.53 MB)
9 Metcalfe, R. A.; Chang, C.; Smakhtin, Vladimir. 2005. Tools to support the implementation of environmentally sustainable flow regimes at Ontario’s waterpower facilities. Canadian Water Resources Journal, 30(2):97-110.
Rivers ; Water management ; Stream flow ; Ecosystems ; Watershed management ; Simulation models / Canada / Ontario
(Location: IWMI-HQ Call no: IWMI 333.91 G374 MET Record No: H038123)
(1.10 MB) (1.09 MB)
10 Chaponniere, Anne; Smakhtin, Vladimir. 2006. A review of climate change scenarios and preliminary rainfall trend analysis in the Oum Er Rbia Basin, Morocco. Colombo, Sri Lanka: International Water Management Institute (IWMI). v, 16p. (IWMI Working Paper 110: Drought Series, Paper 8) [doi: https://doi.org/10.3910/2009.291]
Climate change ; Rivers ; Watersheds ; Groundwater irrigation ; Water scarcity ; Precipitation ; Rainfall-runoff relationships ; Sensitivity analysis ; Simulation models / Morocco / Oum Er Rbia Basin
(Location: IWMI-HQ Call no: IWMI 333.91 G236 CHA Record No: H038782)
(320 KB)
11 Smakhtin, Vladimir; Thenkabail, Prasad; Gamage Nilantha. 2006. Developing on-line near-real time drought monitoring system for South West Asia. In Savin, I.; Nègre, T. (Eds.). Agro-meteorological monitoring in Russia and Central Asian countries. Ispra (VA), Italy: Institute for the Protection and Security of the Citizen. pp.104-118.
(Location: IWMI-HQ Call no: IWMI 551.5773 G570 SMA Record No: H039068)
(1.28 MB)
12 Smakhtin, Vladimir; Shilpakar, R. L.; Hughes, D. A. 2006. Hydrology-based assessment of environmental flows: an example from Nepal. Hydrological Sciences Journal, 51(2):207-222.
Environmental impact assessment ; Hydrology ; Simulation ; Rivers ; Time series analysis ; Water resource management ; Planning ; Water allocation ; River basin development / Nepal
(Location: IWMI-HQ Call no: IWMI 551.483 G726 SMA Record No: H039243)
http://www.informaworld.com/smpp/ftinterface~content=a918693438~fulltext=713240930~frm=content
https://vlibrary.iwmi.org/pdf/H039243.pdf
https://vlibrary.iwmi.org/pdf/H039243.pdf
13 Morid, S.; Smakhtin, Vladimir; Moghaddasi, M. 2006. Comparison of seven meteorological indices for drought monitoring in Iran. International Journal of Climatology, 26:971-985.
(Location: IWMI-HQ Call no: IWMI 551.5773 G690 MOR Record No: H039244)
14 Smakhtin, Vladimir; Anputhas, Markandu. 2006. An assessment of environmental flow requirements of Indian river basins. Colombo, Sri Lanka: International Water Management Institute (IWMI). 36p. (IWMI Research Report 107) [doi: https://doi.org/10.3910/2009.106]
River basins ; Environmental flows ; Assessment ; Hydrology ; Ecology ; Ecosystems ; Water allocation ; Water requirements ; Time series / India
(Location: IWMI-HQ Call no: IWMI 551.483 G635 SMA Record No: H039610)
(488KB)
The primary purpose of this report is to stimulate the debate about environmental water allocations in India, where this concept is only beginning to receive attention and recognition. It is a component of a larger research project which aims to assess multiple aspects of India's National River Linking Project and water future in general.
15 Smakhtin, Vladimir; Hughes, D. A. 2007. Automated estimation and analyses of meteorological drought characteristics from monthly rainfall data. Environmental Modelling and Software, 22:880-890.
Drought ; Estimation ; Precipitation ; Indicators ; Rain ; Time series ; Computer software ; Hydrology ; Models
(Location: IWMI-HQ Call no: IWMI 551.5773 G178 SMA Record No: H039733)
16 Smakhtin, Vladimir. 2007. Environmental flows: A call for hydrology. Hydrological Processes, 21:701-703.
(Location: IWMI-HQ Call no: IWMI 577.64 G000 SMA Record No: H039734)
17 Smakhtin, Vladimir; Arunachalam, M.; Behera, S.; Chatterjee, A.; Das, S.; Gautam, P.; Joshi, G. D.; Sivaramakrishnan, K. G.; Unni, K. S. 2007. Developing procedures for assessment of ecological status of Indian River basins in the context of environmental water requirements. Colombo, Sri Lanka: International Water Management Institute (IWMI). 34p. (IWMI Research Report 114) [doi: https://doi.org/10.3910/2009.114]
River basins ; Ecology ; Indicators ; Environmental flows ; Environmental management ; Habitats ; Biota ; Fish ; Ecosystems / India / Krishna River Basin / Chauvery River Basin / Narmada River Basin / Periyar River Basin / Ganga River Basin
(Location: IWMI HQ Call no: IWMI 577.64 G635 SMA Record No: H040333)
(772 KB)
This report attempts to introduce a prototype scoring system for the ecological status of rivers in India and illustrate it through the applications in several major river basins. This system forms part of the desktop environmental flow assessment and is based on a number of indicators reflecting ecological condition and sensitivity of a river. The unique aspect of this study is that it interprets, for the first time, the existing ecological information for Indian rivers in the context of environmental flow assessment. The report targets government departments, research institutions and NGOs which are engaged in environmental flow management and associated policy development, and suggests some subsequent steps in environmental flow work in India.
18 Smakhtin, Vladimir. 2007. Climate change: a new avenue for IWMI? Water figures: quarterly newsletter of the International Water Management Institute (IWMI), 1:4-5. [doi: https://doi.org/10.3910/2009.353]
(Location: IWMI HQ Call no: IWMI 630.7 G000 IWM Record No: H040537)
19 Smakhtin, Vladimir. 2007. Giving voice to environmental water needs. Water Matters: news of IWMI research in Sri Lanka, 3:2.
(Location: IWMI HQ Call no: IWMI 577.68 G744 IWM Record No: H040538)
20 Dissanayake, Priyanka; Smakhtin, Vladimir. 2007. Environmental and social values of river water: examples from the Menik Ganga, Sri Lanka. Colombo, Sri Lanka: International Water Management Institute (IWMI). 15p. (IWMI Working Paper 121) [doi: https://doi.org/10.3910/2009.304]
Rivers ; Ecosystems ; Wetlands ; Wildlife ; Fisheries ; Water allocation ; Water requirements ; Case studies ; Economic evaluation / Sri Lanka / Menik Ganga / Yala National Park / Yala Fishery Management Area / Pilinnawa Coastal Wetland / Kataragama
(Location: IWMI HQ Call no: IWMI 577.64 G744 DIS Record No: H040566)
(462KB)
Many decisions on water allocation in river basins are made on economic grounds. Environmental and social benefits of water should also be considered in river basin management, and attempts should be made to value them similarly. This is not a straightforward task and very few studies have directly addressed this issue to date. In this paper, the Menik Ganga (River) in southern Sri Lanka is used as a case study to attempt and evaluate the costs and benefits of environmental water allocations, referred to as ‘environmental flows’ (EF). In this study, a broad definition of EF is used: the components of EF evaluated include the requirements of the religious festival, the requirements of the Yala National Park, the requirements of the Pilinnawa Coastal Wetland and the requirements of the Yala Fishery Management Area, off the coast. Almost all estimates are based on use values of EF such as marketed goods and recreation. For some components multiple estimates have been attempted. The religious EF requirement is estimated using the cost of alternative water supplies. The benefits of the EF requirement for the Yala National Park are estimated using the forgone value of tourism in the dry season and the benefits of avoiding the Human-Elephant Conflict. The Additional expenditure for the park in the dry season is also presented as another proxy estimate of the benefits of EF. The Benefit Transfer method was used for the Pilinnawa Wetland and grassland due to data constraints. The market prices of lobster and income of chank divers are used as proxies for the economic benefits of EF to the Yala Fishery Management Area. Finally, the cumulative value of the individual components is presented and discussed. The paper intends to stimulate discussion and further research on the complex subject of valuing the social and environmental benefits of water – whether it is in the Menik Ganga, elsewhere in Sri Lanka or elsewhere in the world.
Powered by DB/Text WebPublisher, from
